Not quite – Cessation would be more halting dead thing not resurrecting them. So they could use Henry’s poison to kill Sue and Kathryn. Especially if they can synthesize it. (If they don’t need Kat’s science, then she would become expendable)

yep, henry handing over a sample is REALLY going to bite them in the butt.
sue better start chopping carrots, cause kat will need galleons of grandma bunny´s cure to analyse and come up with a vaccine…..hopefully.